Table 1 Statistical values (median, mean, one standard deviation (STD)) of (a) derived OHeff and stratospheric OHr for different mean age groups; (b) chlorine radical in the stratosphere during 2010–2015 (unit in 103 molecules cm−3); and (c) stratospheric OHr in the stratosphere during 2010–2015 (unit in 104 molecules cm−3)

From: Tropospheric OH and stratospheric OH and Cl concentrations determined from CH4, CH3Cl, and SF6 measurements

(a)

Mean age [day]

 

0–100

100–200

200–400

400–500

500–700

700–1100

OHeff derived from CH3Cl ( × 105 molecules cm−3)

Median

9.9

2.2

1.4

1.8

1.6

2.2

Mean

10.9

2.5

1.6

1.9

1.8

2.1

STD

9.6

2.0

1.2

1.3

1.2

0.6

OHeff derived from CH4 ( × 105 molecules cm−3)

Median

26.3

4.3

2.5

2.9

3.5

4.5

Mean

31.4

4.5

2.7

3.0

3.5

4.4

STD

14.1

3.4

1.6

1.7

1.4

1.1

Stratospheric OHr ( × 104 molecules cm−3)

Median

  

13.0

8.8

9.7

9.0

Mean

  

12.8

10.3

11.1

9.9

STD

  

7.6

7.5

8.1

7.0

(b)

 

2010

2011

2012

2013

2014

2015

Median

10.4

11.6

12.6

6.9

8.2

9.7

Mean

11.7

10.9

12.1

7.3

10.0

11.3

STD

6.9

4.9

6.8

5.1

5.7

6.4

(c)

 

2010

2011

2012

2013

2014

2015

Median

9.2

8.2

11.9

12.8

5.4

9.3

Mean

11.8

9.5

12.1

12.4

8.5

9.6

STD

7.8

7.9

8.2

7.9

6.9

5.1